We would like to inform you that from our checks we could not reproduce the HTTP 502 error.
In any case, we have made the necessary alterations, so that the web-page agioi-pantes.gr can be opened via the hosts file, of your operating system, in case this was how you tried to open the page
in the first place.
Alternatively, and if the problem persists, please do forward us the IP address from which you tried to access the page, so we can check the server’s logs and see if there is any information in there, regarding your IP.

Regarding the PHP limits, we would like to inform you that we have increased all of the PHP limits of the agioi-pantes.gr subscription, to the maximum possible values of a Shared Hosting package.
Since we can not further increase these values, if you can not import the theme, you will have to install it locally, and then upload it to the server via FTP.

Please do check the above, and inform us if there is anything else you need assistance with.

Now I am able to see your website and can login to wp-admin. I see you have some content already filled in but to import the demo content I need to either remove already there content or you can provide a fresh database. Also let me know which demo content you want me to import, the page templates one or the page builder? Thanks

Page templates use several meta boxes to manage the content but it will not let you change the layout of your page and it will remain same as you see on the demo site. Whereas with page builder you will have different widgets for all parts of the design which you can use with a drag drop builder to create your own layout for pages. NativeChurch comes with SiteOrigins page builder support. Thanks

Sure, We will setup the demo for you on your website. But the database needs to be cleared from your side as I can see you have some sermons and other posts in your language already. You can either delete them from WP Dashboard or can clean them from your database.

The demo import will have the same layout as you sent in the recent screenshot but the images you see on the demo will be replaced by other free images as the demo images are copyrighted. For the language, language files included in the theme are done using the Google Translator which will take effect you set your website language to Greek from Settings => General.

My team tried several times but the demo importer is not working correctly on your website. I suggest you to connect a new database to your website and let me know once it’s done so we can try again from scratch.

Try adding these files in your theme => language folder https://d.pr/f/J3JehJ+
The post/event/sermon and other post types titles needs to be changed from with in the WP Dashboard by editing the posts for them.